| Author | Isaac Asimov |
| Imprint | Harper Voyager |
| Publisher | HarperCollins Publishers Ltd |
| Series | Robot |
| Typeset by | Palimpsest Book Production Limited |
| Printed and Bound by | CPI Group (UK) Ltd |
| Cover/Jacket Design by | Mike Topping |
| Copyright Holder | Isaac Asimov |
| First Published by | Dobson Books Ltd. |
| Format | Paperback |
| Language | English |
| Location | UK |
| This Edition Published | 2018 |
| Copyright | 1950 |
| Copyright | 1977 |
| First Printing in Country | 1967 |
| Pages / Font | 244 pages / Janson Text |
| ISBN | 978-0-00-827955-4 |
| Barcode | 9780008279554 |
| Price | UK £8.99 |
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